IODP Expedition 362 Bulk density (GRA)

Gamma ray attenuation (GRA) data were acquired using a Cs-137 collimated source and a sodium iodide (thallium), or NaI(Tl), scintillation detector. The signal was calibrated using water and aluminum standards to provide a proxy for bulk density. This measurement was performed by a sensor mounted on either the Whole-Round Multisensor Logger (WRMSL) or the Special Task Multisensor Logger (STMSL); which track was used for a given data set is indicated in the data.伽马射线衰减（Gamma Ray Attenuation, GRA）数据通过铯-137准直源与碘化钠（铊）[NaI(Tl)]闪烁探测器采集得到。该信号采用水和铝标准物质进行校准，以作为体积密度的替代表征指标。此项测量由安装于全井眼多传感器测井仪（Whole-Round Multisensor Logger, WRMSL）或特殊任务多传感器测井仪（Special Task Multisensor Logger, STMSL）上的传感器完成；特定数据集所使用的测井仪类型会在数据中予以标注。